.container{
  margin: 30px auto;
  width: 720px;
  height: 405px;
  background-color: #eee;
  overflow: hidden;
}

ul {
  margin: 0;
  padding: 0;
  overflow: hidden;
  list-style: none;
}
ul>li{
  text-align: center;
  line-height: 405px;
  width: 720px;
  height: 405px;
  float: left;
}
ul>li:nth-child(1) {
  background-color: #bfa;
}
ul>li:nth-child(2) {
  background-color: rgb(158, 158, 158);
}
ul>li:nth-child(3) {
  background-color: rgb(255, 161, 247);
}
ul>li:nth-child(4) {
  background-color: rgb(75, 209, 209);
}
ul>li:nth-child(5) {
  background-color: #bfa;
}
